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| Rigol Rubbish DG800 - An expensive piece of Junk |
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| Aldo22:
--- Quote from: ebastler on May 13, 2024, 10:35:00 am ---What would be your recommendation for a dual-channel HP AWG in that price range? The HP 33120A looks plausible but is single-channel only. Did they make a comparable model with two channels? --- End quote --- Could you explain to me what is better about the 33120A than a modern AWG? That's an honest, naive question. I would like to understand it. When I look at the specs, I don't see much that sounds particularly great. Amplitude resolution 12 bits Sample rate 40 MSa/s Sine 100 μHz - 15 MHz Square 100 μHz - 15 MHz Triangle 100 μHz - 100 kHz Ramp 100 μHz - 100 kHz Rise/Fall time < 20 ns etc. So how do I know that this device is good/better, other than by hearsay? |
| ebastler:
I don't think I claimed that it is better. ;) Some specs are a tad better than the low-end Rigol discussed in this thread (e.g. total sine distortion in the audio range), others are a tad worse. Overall, both punch in a similar class, I'd say. The modern devices have more features, e.g. dual-tone and harmonic generation, a touch screen, and USB instead of RS-232 & GPIB. They might also have a few unexpected software bugs, which are less likely in mature HP and comparable gear. A comprehensive service manual is available for the 33120A, but not for the Rigol to my knowledge. I think it's largely a matter of preference whether one likes "solid feel and established brand" or "made in China, more features". In the specific case at hand, I am not aware of a (roughly) comparable HP dual-channel generator in this class, so the vintage route might not offer a real alternative. |
| Aldo22:
--- Quote from: ebastler on May 13, 2024, 11:15:10 am ---I don't think I claimed that it is better. ;) --- End quote --- That's right, you didn't say that, but Jean-Paul did. I was referring to your post because you mentioned a specific model. My question to @jonpaul remains: Why is a 40 year old HP FG AWG better than "junk from China" when the "junk from China" is better in almost every specification? How can I tell? I mean, I know that some people say that a Mercedes-Benz /8 is the best car ever. But would you really buy one today? ;) |
| Berni:
The OP should try one of the cheap Hantek signal generators, those are a buggy mess of a cheap chinese product. Not saying the Rigol DG800 series is perfect, but it is a damn good deal for the price. It is very feature packed for its price class and it does work reliably without any major UI problems (even if the UI is not the best out there). Feel free to purchase a more expensive signal generator if you have more advanced needs. But in this price range you will be hard pressed to find something better. |
| Aldo22:
--- Quote from: Berni on May 13, 2024, 11:42:01 am ---The OP should try one of the cheap Hantek signal generators, those are a buggy mess of a cheap chinese product. --- End quote --- To which specific model does your statement refer? HDG3000B Series HDG3000C Series HDG6000B Series Can you share your experience with us? Information on these is relatively scarce. |
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